Home / 15,721.08-21,711.96-9,766.86

Finding the Fourth Proportional to 15,721.08, 21,711.96 and 9,766.86

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Solution

The fourth proportional to 15,721.08, 21,711.96 and 9,766.86 is: 13,488.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.08 : 21,711.96 = 9,766.86 : x
  2. Step 2: Convert to fraction form
    15,721.08/21,711.96 = 9,766.86/x
  3. Step 3: Cross multiply
    15,721.08x = 21,711.96 × 9,766.86
  4. Step 4: Simplify right side
    15,721.08x = 212,057,673.65
  5. Step 5: Solve for x
    x = 212,057,673.65/15,721.08
  6. Step 6: Final answer
    x = 13,488.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.